Cisco CRS Carrier Routing System Multishelf System Site Planning Guide
Cisco CRS Multishelf System Overview
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Table of Contents

Cisco CRS Multishelf System

Multishelf System Overview

Fabric Card Chassis Components

Fabric Card Chassis Slot Numbers

Overview of Site Planning Steps

Cisco CRS Multishelf System

This guide describes how to plan and prepare your facilities for the installation of a Cisco CRS Carrier Routing System Multishelf System. Because the installation of a multishelf system may require space, floor loading, power, and cooling modifications to a facility, the site planning should be done well in advance of the scheduled delivery of the system.


Timesaver If you are already familiar with Cisco CRS routers and components, go straight to the “Overview of Site Planning Steps” section and the preliminary site survey in Appendix C, “Preliminary Site Survey.”


This chapter describes the multishelf system and its main components. It contains the following sections:


Note The Cisco CRS multishelf system consists of LCCs and FCCs. This site planning guide describes the FCC and the multishelf system. See the Cisco CRS Carrier Routing System 16-Slot Line Card Chassis Site Planning Guide for specific LCC site planning information.



Note Throughout this document, the generic term Cisco CRS Carrier Routing system refers to the Cisco CRS-1, Cisco CRS-3, and Cisco CRS-X Carrier Routing Systems, unless otherwise specified.


Multishelf System Overview

Multishelf system configurations are available with one, two, or four FCCs and up to eight LCCs. For a complete introduction to multishelf systems, see Cisco CRS Carrier Routing System Multishelf System Description .

Figure 1-1 shows the single-FCC multishelf system, which contains the following major components:

  • Up to eight LCCs
  • One FCC

Figure 1-1 Front View of the Single-FCC Multishelf System

 

 

1

LCC

2

FCC

Figure 1-2 shows the two-FCC multishelf system, which contains the following major components:

  • Up to eight LCCs
  • Two FCCs

Figure 1-2 Front View of the Two-FCC Multishelf System

 

 

1

LCC

2

FCC (two required)

Figure 1-3 shows the four-FCC multishelf system, which contains the following major components:

  • Up to eight LCCs
  • Four FCCs

Figure 1-3 Front View of the Four-FCC Multishelf System

 

 

1

LCC

2

FCC (four required)

Fabric Card Chassis Components

This section lists the main components of the FCC. It primarily identifies the components that are considered field-replaceable units (FRUs).

The FCC contains:

  • Switch fabric cards (SFCs). The SFCs are the main component of the multishelf system that enables packets to be switched from source to destination. The SFCs on the FCC provide Stage 2 of the three-stage Benes switch fabric for the multishelf system. The S13 SFCs in the LCC provide Stage 1 and Stage 3 of the switch fabric. Three types of SFC are supported: CRS-FCC-SFC for the 40 G CRS-1 system, and CRS-FCC-SFC-140 for the 140 G CRS-3 system, and CRS-FCC-SFC-400 for the 400 G CRS-X system. Either eight or twenty-four SFCs are needed, depending on vertical or horizontal cabling. SFCs are located at the front of the FCC.

Caution The FCC supports either 40 GB switch fabric cards (CRS-FCC-SFC), 140 GB switch fabric cards (CRS-FCC-SFC-140), or 400 GB switch fabric cards (CRS-FCC-SFC-400). An FCC with a mix of 40 GB,140 GB and 400 GB SFCs is not a supported mode of operation. Such a mode is temporarily allowed only during the upgrade process.

  • Optical Interface Modules (OIMs). The OIMs are passive devices that provide the fiber cross-connect function. The OIMs distribute the fibers within each cable bundle to the SFCs. Each OIM is matted to an SFC. The OIMs are monitored by the OIM-LED card. Each OIM has 9 interfaces and either 8 or 24 OIMs are needed, depending on horizontal or vertical cabling. The OIMs and cables are located at the rear of the FCC.
  • Integrated Shelf Controller Gigabit Ethernet (SCGE) cards. The 22-port SCGE card (CRS-FCC-SC-22GE and CRS-FCC-SC-22GE-B) serves as a shelf controller for the FCC, providing the control function similar to the RP for LCC. The 22-port integrated GE switch provides the connectivity for control protocol between the FCC and LCC. Two 22-port SCGE cards are included in each FCC for redundancy. Only one shelf controller card is active at a time. The second acts as a “standby” shelf controller, serving as a backup if the active card fails. SCGE cards are located at the front of the chassis
  • Two types of power system are available: fixed configuration power and modular configuration power. Both power configurations use either AC or DC power and are fully redundant.
  • Upper and lower fan trays. The upper and lower fan trays are identical and are interchangeable within the chassis. A removable air filter is also located above the lower fan tray.
  • Exterior cosmetic components. The FCC includes front and rear locking doors, bezels and side panels. The exterior cosmetic components are shipped in a separate package and must be installed during system installation.

Figure 1-4 shows the front (SFC) side and rear (OIM) side view of an FCC with a fixed configuration AC power system installed.

Figure 1-4 Front (SFC) and Rear (OIM) View of FCC—Fixed Configuration AC Power

 

 

1

Power shelves with AC rectifiers installed

4

Lower card cage

2

Upper fan tray (accessible from front)

5

Air filter (accessible from front)

3

Upper card cage

6

Lower fan tray (accessible from front)

Figure 1-5 shows the front (SFC) side view of a fixed configuration AC and DC power system installed at the top of the FCC.

Figure 1-5 Front (SFC) View of Fixed Configuration Power Shelves Installed in FCC

 

 

Figure 1-6 shows the rear (OIM) view of a fixed configuration AC and DC power system installed at the top of the FCC.

Figure 1-6 Rear (OIM) View Fixed Configuration Power Shelves Installed in FCC

 

Figure 1-7 shows the front (SFC) view of a modular configuration AC and DC power system installed at the top of the FCC.

Figure 1-7 Front (SFC) View of Modular Configuration Power Shelves Installed in FCC

 

 

Figure 1-8 shows the rear (OIM) view of a modular configuration AC and DC power system installed at the top of the FCC.

Figure 1-8 Rear (OIM) View of Modular Configuration Power Shelves Installed in FCC

 

 

Fabric Card Chassis Slot Numbers

This section identifies the locations and slot numbers for major cards that plug into the FCC.

Figure 1-9 shows the chassis slot numbers on the front (SFC) side of the FCC.

Figure 1-9 FCC Front (SFC) Side Slot Numbers

 

 

1

Upper card cage

2

Lower card cage

As shown in Figure 1-9, the components on the front (SFC) side of the FCC include:

  • Upper card cage with 12 switch fabric slots (left to right: 0, 1, 2, 3 . . . 10, 11) followed by one 22-port integrated SCGE card slot (SCGE0) on the far right.
  • Lower card cage with 12 switch fabric slots (left to right: 12, 13, 14 . . . 21, 22, 23) followed by one 22-port integrated SCGE card slot (SCGE1) on the far right.

Figure 1-10 shows the chassis slot numbers on the rear (OIM) side of the FCC.

Figure 1-10 FCC Rear (OIM) Side Slot Numbers

 

 

1

Upper card cage

2

Lower card cage

As shown in Figure 1-10, slot numbers on the OIM side of the chassis include:

  • OIM side of upper card cage, with one OIM LED panel (OIM LED 0) on the far left, followed by 12 OIM slots (left to right: 11, 10, 9 . . . 2, 1, 0).
  • OIM side of lower card cage, with one OIM LED panel (OIM LED 1) on the far left, followed by 12 OIM slots (left to right: 23, 22, 21 . . . 14, 13, 12).

The OIM slot numbers are reversed from the SFC slot numbers on the other side of the chassis. The SFC slot numbers match their corresponding OIM slot numbers on the rear side of the chassis. OIM slot 0 is on the far right side of the of the chassis looking at it from the rear (OIM) side; SFC slot 0 is on the far left side of chassis looking at it from the front (SFC) side.

Overview of Site Planning Steps

Table 1-1 lists the sequence of tasks to perform as you plan the installation of the multishelf system. Use the table as a checklist for all aspects of the installation. For information about a particular task, see the appropriate section of this site planning guide. After completing the checklist, you should consult your Cisco installation coordinator for a site readiness inspection.

See Appendix C, “Preliminary Site Survey,” for a sample of the preliminary site survey that you should complete before you prepare a detailed site survey.

 

Table 1-1 Multishelf System Installation Checklist

Site Planning Steps
See
Check

1. Make sure that you have all necessary components for the multishelf system.

Multishelf System Overview

2. Plan the layout and switch configuration for the multishelf system.

Planning the Layout of the Multishelf System

Planning the Switch Fabric Configuration

3. Plan the cabling runs and cable management for the system chassis.

Multishelf System Cable Management

Cable Management

Table 1-2 lists the steps to prepare your site for the installation of a Cisco CRS fabric card chassis. Use the table as a checklist for all aspects of the installation. For information about a particular task, see the appropriate section of this site planning guide. After completing the checklist, you should consult your Cisco installation coordinator for a site readiness inspection.

See Appendix C, “Preliminary Site Survey,” for a sample of the preliminary site survey that you should complete before you prepare a detailed site survey.

 

Table 1-2 Fabric Card Chassis Installation Checklist

Site Planning Steps
See
Check

1. Determine where to install the chassis. Ensure that the installation site meets the necessary requirements (including space).

“Basic FCC Floor Plans” section

“Chassis Floor Loading” section

“Anchoring the Chassis to the Floor” section

2. Plan for power (fixed or modular configuration, AC or DC) and grounding.

“General Power and Grounding Requirements” section

“DC Power System” section

“Regulatory, Compliance, and Safety Specifications” section

“AC Power System” section

3. Consider cooling and airflow requirements.

“Fabric Card Chassis Airflow” section

“Fabric Card Chassis Environmental Specifications” section

4. Consider equipment arrival, storage, and transport to the installation site.

“Receiving and Storing Routing System Components” section

“Transport to the Installation Site” section

5. Check if system planning requirements, such as high availability and cable management, have been met.

“Power Redundancy” section

“Multishelf System Cable Management” section